Sandpapering device



H. LAGERQUIST vAND J. P. ANDERSON. SANDPAPERING DEVICE.

A119911121111011' man 111111119. 1919.

UNITED STATES vPATiazNT ori-ica- HENRY memursfr AND JULIUs r. ANDEasoN.or DES norNEs, Iowa.

sANDrArEmNG DEVICE.

'A vSpeeile'tiou of I-.etters Patent. .Patentd Jan. 18, 1921 Applicationined umn 1s, vwie. i semi No. 298,293.

simple, durable and inexpensive construction. j

More particularly it is our object to provide a sandpapering device ofcomparatively light weight which includes a suitable handle formanipulating the device and a reciprocating member adapted. to receive asheet of sandpaper, which may be readily installed or removed forreplacing wit other sandpaper. i

With these and other objects in view our invention consists in the`construction, ar-

Vrangement and combination of the various parts of the device, wherebythe objects contem lated are attained, as herein more fully set orth,pointed out in our claims and illustrated in the accompanying drawings,in which. y

Figure 1 shows a side elevation of a salidpapering device embodying ourinvention.

Fig. 2 shows a lon itudinal, vertical, secv tional view through t esame.

Fig. 3 showsa horizontal sectional, view taken on the line 3--3 of Figl1.

Fig. 4 shows a detail, sectional View taken on the line 4-4 of Fig. 2.

Fig, 5 shows a plan view of the upper sur- .lfilicel-{of one end of thesandpaper holding Fig. 6 shows a detail, sectional view taken throughone of the plates of the device illustrating the sliding mounting of thereciprocating member to which the sandpaper l holding block is secured..

In the accompanying drawings, which illustrate a Iform in which ourpower operated sandpapering machine may be embodied, we haveused thereferenceA numeral 10 to indicate generally the upper member of ourdevice, which, for convenience we will call the cover.

The cover 10 has at its forward and rear` ward ends downwardly extendingflanges 11 and 12, and at its sides downwardly extendin anges 13 whichare shorter than the en fianges.

On the cover 10 is a gear casing member 14 from whichprojects a handle15 which i has a central bore forming a journal for a shaft 16. Theshaft 16 is mounted in ball 4bearings 17 and 18 inthe handle 15 and thegear casing 16. The outer' end of the. shaft 16 is connected with afiexble shaft 19.

`On the inner end of the shaft 16 within the casingl 14 is a beveledgear 20. A short shaft 21 is mounted in the cover 10, and hasI mountedon it within the device'a beveled gear 22 which meshes with the gear 20.

Fixed on the lower Aend of the shaft 21 is an arm 23. 'Secured to thearm 23 isa downwardly projecting shaft 24 having on its lower end a head25 provided with a screw-driver slot 26.

Y On the shaft 24 is a sleeve or bushing 27. The shaft 24 projectsthrough a plate 23 which vhas a laterally elongated slot 2%),surrounding which is an upwardly extending rib for forming a betterbearing for the. shaft 24.

Suitably supported on the flanges 13 above the plate 28l are shafts 31on which are. roller bearings 32 or other suitable anti-frictiondevices.

Just rearwardly of the roller 32 'adjacent to the handle 15 is adownwardly extending flange 33, and just forward of the forward roller32 is a downwardly extending flange 34. The purpose of these Hanges willbe hereinafter more fully explained. j

' Secured to the flanges 13 by means of screws or the like 35 are side-1)lates 36,

which projectbelow the flanges 13 and have. at their lower edgesinwardly extending spaced pairs of flanges 37. The two fianges.

on each side-plate 36 forni a guideway in whichare mounted antrfrirtionrollers 38. The side ed res of the plate 28 are. mounted in said guieways, as clearly illustrated in Figs. 2 and 4.

Secured to the under surf aco of the pla-tc 28 is a sandpaper holdingblock 39.

The sandpaper holding block 3i) is secured to the plate 28 by means ofscrews 40, the

heads of which are countersuiik in the block device.

-jecting ends of the bolts 44 is a strip 45.

The sand paper may be provided with holes to receive the bolts 44.

By screwing the nuts 46 on to the ,bolts 44v one end of the sand papermay be frmlly; gripped between the strip 45 and the bloc 34. The block39 is provided with rabbets at its sides in its upper surface to receivethe lower flanges 37 and the lower edges of the side-plates 36, asillustrated in Fig. 4, and to form guides for the. reciprocatingmovement of the sandpaper block.

Formed on the outer surface of the flanges 11 and 12 are ribs 49 toprotect the In the practical operation of our improved power operatedsandpapering device it will be understood that the shaft 19 is connectedwith a suitable source of power, whereby rotation may be imparted to theshaft 19 and the shaft 16.

Rotation is imparted from the gear 20 to the gear 22, and thence t o theshaft 21 for operating the arm 23 as a crank.

As the arm 23 swings around in a circle, centered at the center of theshaft 21, the shaft 24 is swung around in the slot 29 for glie plate 28and to the sandpaper holding ook.

The flanges 33 and 34 help to keep dust from the sandpaper away from thegearing ofthe device.

It will be seen that the. device may be readily and easily taken apartfor repair or for replacing any 'parts that may become The shaft 21 hasits upper end screwthreade'd to receive a nut for readily installing orremoving. the shaft and the gearing.

departing from the essential features and purposes of our invention, andit is our intention to cover by our clanns any modiplate,

fied forms of structure or use of mechanical equivalents which may bereasonably in eluded within the scope of said claims:

e claim as our invention:

1. In a device of the class described, a cover member, having downwardlyextending front, and back and side flanges, a handle on said covermember, extending away therefrom, a removable guide on each of said sideflanges, a plate slidably mounted in said guides, having a laterallyelongated slot therein, a shaft mounted in said handle, a gearing devicethereon, an upright shaft mounted in said cover, a gearing devicethereon in mesh with said first gearing device, an arm on said secondshaft, a third shaft mounted in said arm and projected into said slot,and means for mounting an abrading device on said plate.

2. In a device of the class described, a cover member, having downwardlyextending front, and back and side dle on said cover member, channeledguide devices mounted on said side flanges, a plate mounted forlongitudinal reciprocation be* tween said flanges, and having its edgesreceived in said guide devices, means for imparting reciprocatorymovement to said means for supporting an abrading device on said plate,said means comprising a block detachably mounted on the under surface ofsaid plate, said block having in one end a slot and having at the otherend an thereby imparting reciprocating motion to adjustably supportedstrip, a sheet of abrading material having one edge received in saidslot and having its other end received between said strip and saidblock.

In a device of the class described, a cover member, having downwardlyextending front, and back and side flanges, a handle on said covermember, channeled guide devices mounted on said-side flanges, a platemounted for longitudinal flanges, a hanreciprocation between saidflanges, and having its edges received in said guide devices, means forimparting reciprocatory movement to said plate, means for supporting anabrading device on said plate, anti-friction rollers mounted on saidcover, and designed to bear on the top of said plate when said device isin use. I.

Des Moines, Iowa, `May 14, 1919.

HENRY LAGERQUIST. JULIUS P. ANDERSON.

